Braždžionytė, J., A. Macas, and R. Žaliūnas. “Evaluation of Intra-Aortic Balloon Counterpulsation Impact on Stroke Volume Using a Non-Invasive Technique: Impedance Cardiography”. Elektronika Ir Elektrotechnika, vol. 79, no. 7, Aug. 2007, pp. 53-58, https://eejournal.ktu.lt/index.php/elt/article/view/10839.